Torque Converter: Testing and Inspection

U660E AUTOMATIC TRANSAXLE: TORQUE CONVERTER CLUTCH AND DRIVE PLATE: INSPECTION

1. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

(a) Inspect the one-way clutch.

(1) Press on the spline of the stator with a finger and rotate it. Check that it rotates smoothly when turned clockwise and rotates heavily when turned counterclockwise.

If necessary, clean the torque converter and recheck the one-way clutch.

Replace the torque converter if the one-way clutch still fails the inspection.





(b) Determine the condition of the torque converter clutch assembly.





(1) Check that the following conditions are met:

* During the stall test or when the shift lever is in the N position, metallic sounds are not emitted from the torque converter clutch.

* The one-way clutch turns in one direction and locks in the other direction.

* The amount of powder in the ATF is not greater than the sample shown in the illustration.

HINT
The sample illustration shows approximately 0.25 liters (0.26 US qts, 0.22 Imp. qts) of the ATF taken from a removed torque converter clutch.

(c) Replace the ATF in the torque converter clutch.

(1) If the ATF is discolored and/or has a foul odor, rock the torque converter to move the fluid around inside it. Drain the ATF with the mounting surface of the converter facing upward.

(d) Clean and check the oil cooler and oil pipe line.





(1) If the torque converter clutch is inspected or the ATF is changed, clean the oil cooler and oil pipe line.

HINT
* Spray compressed air of 196 kPa (2 kgf/cm2, 28 psi) into the inlet hose.
* If excessive fine powder is found in the ATF, add new ATF using a bucket pump and clean it again.
(2) If the ATF is cloudy, inspect the oil cooler (radiator).

(e) Prevent deformation of the torque converter clutch and damage to the oil pump gear.





(1) When any marks due to interference are found on the end of the bolt for the torque converter clutch and on the bottom of the bolt hole, replace the bolt and the torque converter clutch.

(2) All of the bolts must be the same length.

(3) Washers must be used with the bolts.

2. INSPECT DRIVE PLATE

(a) Check the drive plate for damage.

(b) Set up a dial indicator and measure the runout of the 6 portions around the torque converter fitting surfaces.





Maximum runout:

0.30 mm (0.0118 in.)

(c) If the runout is not within the specification or the drive plate is damaged, replace the drive plate.